CN106641074B - A kind of intelligent feedback variable throttling buffer system and its way to play for time - Google Patents

A kind of intelligent feedback variable throttling buffer system and its way to play for time Download PDF

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Publication number
CN106641074B
CN106641074B CN201710119902.0A CN201710119902A CN106641074B CN 106641074 B CN106641074 B CN 106641074B CN 201710119902 A CN201710119902 A CN 201710119902A CN 106641074 B CN106641074 B CN 106641074B
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China
Prior art keywords
cushion dashpot
control valve
valve block
cylinder
direct acting
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CN201710119902.0A
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Chinese (zh)
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CN106641074A (en
Inventor
王成龙
邱志伟
曾庆良
陈萌
刘志海
马凡凡
孟昭胜
冯鹏超
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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Priority to CN201710119902.0A priority Critical patent/CN106641074B/en
Publication of CN106641074A publication Critical patent/CN106641074A/en
Priority to CA3002263A priority patent/CA3002263C/en
Priority to PCT/CN2017/095573 priority patent/WO2018157549A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
    • F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
    • F16F9/461—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall characterised by actuation means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/3405—Throttling passages in or on piston body, e.g. slots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • F16F9/5123—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity responsive to the static or steady-state load on the damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • F16F9/5126—Piston, or piston-like valve elements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

A kind of intelligent feedback variable throttling buffer system and its control method, belong to variable throttling buffer system and its way to play for time.Buffer system: one end of direct acting cylinder is connect with linear motor, and the other end is connect with stroke control valve block, and stroke control valve block is connect by pipeline with cushion dashpot；One end of cushion dashpot is connected with throttling control valve block, and the other end is connected with cushion dashpot cylinder cap；Velocity sensor and displacement sensor are connected on cushion dashpot cylinder cap；Controller and pressure sensor are connected on throttling control valve block；The stepper motor coaxial with cushion dashpot is connected on throttling control valve block.Advantage: buffer capacity follows shock loading to change and change, and realizes high efficiency buffer；The automatic adjustment of cushion stroke and orifice size is realized using closed-loop control system；Realize the biggish buffering of shock loading variation range；By automatic detection and control system, the buffering of uncertain shock loading is realized；Effectively reduce power volume source；It can compensate for the hydraulic oil leakage problem of hydraulic bjuffer.

Description

A kind of intelligent feedback variable throttling buffer system and its way to play for time
Technical field
The present invention relates to a kind of variable throttling buffer system and its way to play for time, especially a kind of intelligent feedback variable throttling is slow Flushing system and its way to play for time.
Background technique
Buffering equipment is one of indispensable part of all kinds of machines, and existing buffer can only be in lesser range Buffer capacity is manually adjusted, the degree of automation is low, the capacity and stroke of buffer can not be adjusted in real time according to shock loading, for The buffering of overloading load is unable to complete, and can not reliably protect machine；Buffer capacity can only be used below in specified buffer capacity, The damping of shocks and uncertainty for being unable to satisfy large span buffer.
Chinese patent discloses a kind of hydraulic bjuffer for automatically adjusting cushion effect, and publication number CN202251621 is main to tie Structure includes piston, piston rod, cylinder barrel, sponge, sealing ring, guide sleeve and valve block, and drain path the course of work: is arranged on piston And the oil liquid flow of drain path is flowed through by valve block control, when foreign impacts power increases suddenly, the edge of valve block can be adjacent to work Plug, the oil liquid flow for flowing through drain path reduces, therefore cushion effect increases, when foreign impacts power reduces, the edge meeting of valve block Slowly restore to the original state, the oil liquid flow for flowing through drain path increases, and cushion effect reduces therewith, be achieved cushion effect with punching Hit the automatic adjustment of power size.There are the shortcomings that: buffer capacity cannot achieve adjusting, for overload operating condition under shock loading without Method is effectively buffered, and the automatic adjusument with operating condition is less able to achieve, and intelligence degree is not high.
Summary of the invention
The invention aims to provide a kind of intelligent feedback variable throttling buffer system, solving existing buffer can only It is used below in its specified buffer capacity, it is unable to satisfy the problem of damping of shocks of large span is with uncertain buffering.
The object of the present invention is achieved like this: intelligent feedback variable throttling of the invention includes buffer system and buffering side Method；
Buffer system by the closed-loop control of velocity sensor and pressure sensor realize buffer capacity in a wide range of from Dynamic adjustment, specific structure include: linear motor, direct acting cylinder, stroke control valve block, stepper motor, throttling control valve block, acquisition Processor, controller, pressure sensor, cushion dashpot, cushion dashpot cylinder cap, velocity sensor, displacement sensor；
One end of direct acting cylinder is connect with linear motor, and the other end is connect with stroke control valve block, and stroke control valve block passes through Pipeline is connect with cushion dashpot；One end of cushion dashpot is connected with throttling control valve block, and the other end is connected with cushion dashpot cylinder cap；It is buffering Velocity sensor and displacement sensor are connected on cylinder cylinder cap；Acquisition Processor, controller are connected on throttling control valve block And pressure sensor；The stepper motor coaxial with cushion dashpot is connected on throttling control valve block；The output end of controller respectively with Each proportional control valve, stepper motor and linear motor；The output end of pressure sensor, velocity sensor and displacement sensor is equal It is connected with the input terminal of Acquisition Processor, input signal of the controller according to Acquisition Processor, respectively to each valve or motor Implement control.
The controller is singlechip controller；Either PLC controller.
The cushion dashpot includes: support rod, buffering cylinder piston rod, cushion dashpot rod chamber pipeline, fuel tank, prefill valve, delays The gentle cylinder that rushes of cylinder rodless cavity pipeline, oil returning tube, cushion dashpot outer shell, reset spring, cushion dashpot inner casing, buffering the cylinder piston is rushed to reset Piston；
The outer inner cylinder sleeve of cushion dashpot has cushion dashpot inner casing, has reset spring gentle between cushion dashpot outer shell and cushion dashpot inner casing Rush cylinder return piston；There is cushion dashpot cylinder cap in one end of cushion dashpot outer shell and cushion dashpot inner casing, and support rod will by cushion dashpot cylinder cap Cushion dashpot outer shell and cushion dashpot inner casing are connected on throttling control valve block；There are buffering the cylinder piston, cushion dashpot in cushion dashpot inner casing One end of piston rod is connect with buffering the cylinder piston, and the other end for buffering cylinder piston rod is pierced by cushion dashpot cylinder cap；In cushion dashpot outer shell There is fuel tank in outer side, connects oil returning tube between fuel tank and stroke control valve block；It is expert at process control valve block and throttling control valve Cushion dashpot rodless cavity pipeline is connected between block；It is expert between process control valve block and cushion dashpot cylinder cap and is connected with cushion dashpot rod chamber Pipeline and prefill valve.
The throttling control valve block includes: plug, throttle orifice, shaft coupling, screw rod and spool；
The center that throttling control valve block connect one end with stepper motor is linked in sequence and has shaft coupling, screw rod and spool；Throttling One end that control valve block is connect with cushion dashpot is linked in sequence and has plug and throttle orifice, and the throttle orifice side and cushion dashpot are without bar Chamber communicates, and the other side is communicated with cushion dashpot reseting cavity.
The direct acting cylinder includes: three two-way proportioning valves of rod chamber, three two-way proportioning valves of rodless cavity, direct acting cylinder cylinder Lid, direct acting the cylinder piston, stroke control valve block oil circuit, direct acting cylinder piston rod and venthole；
Three two-way proportioning valves of rod cavity and rodless cavity three two are connected on the stroke control valve block connecting with direct acting cylinder Logical proportioning valve；There is stroke control valve block oil circuit in process control valve block of being expert at；It is connected with direct acting cylinder cylinder cap in the other end of direct acting cylinder, Direct acting cylinder cylinder cap is between direct acting cylinder and linear motor；Venthole is provided on direct acting cylinder cylinder cap；There is direct acting cylinder in direct acting cylinder Piston, is connected with direct acting cylinder piston rod in direct acting the cylinder piston, and direct acting cylinder piston rod is connect with linear motor；The stroke control The oil circuit of valve block processed is communicated with fuel tank, cushion dashpot rod chamber oil duct, cushion dashpot rodless cavity oil duct and direct acting cylinder.
Velocity sensor is mounted on the top of cushion dashpot, way to play for time:
(1), the speed of velocity sensor detection alluvium, adjusts cushion stroke and first pressing by stroke control valve block in real time Power；
(2), when impact body touches piston rod head, speed, the pressure of velocity sensor real-time detection impacted object are passed The pressure of sensor real-time detection cushion chamber, the speed signal and pressure signal measured are input to Acquisition Processor, Acquisition Processor Data are converted and calculated, the data after processing pass to controller, and controller output control signal passes through throttling Control the orifice size of valve block control buffer unit.
Specific step is as follows:
Velocity sensor detects the speed v of present percussion object2, the pressure sensor detection of cushion chamber in buffer It is p to cushion dashpot internal pressure2, the two is input to Acquisition Processor jointly, and it is current slow that Acquisition Processor calculates completion automatically The best orifice size s of punching2, current buffer orifice size is s3, Acquisition Processor calculates s automatically2-s3Between difference, Data after will be processed pass to controller, controller output control signal.
Work as s2>s3When, i.e., most pre- orifice size needed for completion Current buffer is greater than current orifice size, controller control Stepper motor, stepper motor drive spool to move linearly by lead screw, have reached throttle orifice reduction by the region that spool covers At the best pre- orifice size s of Current buffer2；
Work as s2<s3When, i.e., best orifice size needed for completion Current buffer is less than current orifice size, controller control Stepper motor, stepper motor drive spool to move linearly by lead screw, have reached throttle orifice increase by the region that spool covers At the best pre- orifice size s of Current buffer2；
Since the mobile rod chamber of buffering the cylinder piston needs oil liquid to supplement, therefore prefill valve is set, when buffering cylinder piston rod is fast When speed is mobile, prefill valve, which is opened, carries out repairing to cushion dashpot rod chamber.
Beneficial effect and advantage:
1, buffer capacity follows shock loading to change and change, and realizes high efficiency buffer；
2, the automatic adjustment of cushion stroke and orifice size is realized using closed-loop control system；
3, it realizes the biggish buffering of shock loading variation range, small shock loading can either be buffered, and favourable opposition can be buffered Hit load；
4, by automatic detection and control system, the buffering of uncertain shock loading is realized
5, the power for adjusting stroke is provided using linear motor driving direct acting cylinder, effectively reduces power volume source；
Detailed description of the invention
Fig. 1 is structure chart of the invention.
Fig. 2 is cushion dashpot structure chart of the present invention.
Fig. 3 is direct acting cylinder structure figure of the invention.
In figure, 1- linear motor；2- direct acting cylinder；3- stroke control valve block；Three two-way proportioning valves of 4- rod chamber；5- is without bar Three two-way proportioning valves of chamber；6- stepper motor；7- throttling control valve block；8- Acquisition Processor；9- controller;10- pressure sensing Device；11- cushion dashpot；12- support rod；13- cushion dashpot cylinder cap；14- velocity sensor；15- buffers cylinder piston rod；16- displacement passes Sensor；17- cushion dashpot rod chamber pipeline；18- fuel tank；19- prefill valve；20- cushion dashpot rodless cavity pipeline；21- oil returning tube； 22- direct acting cylinder cylinder cap；23- cushion dashpot outer shell；24- reset spring；25- cushion dashpot inner casing；26- buffers the cylinder piston；27- plug； 28- throttle orifice；29- shaft coupling；30- screw rod；31- spool；32- cushion dashpot return piston；33- direct acting the cylinder piston;34- stroke control Valve block oil circuit processed；35- direct acting cylinder piston rod；36- venthole.
Specific embodiment
Intelligent feedback variable throttling of the invention includes buffer system and way to play for time:
Buffer system by the closed-loop control of velocity sensor and pressure sensor realize buffer capacity in a wide range of from Dynamic adjustment, specific structure includes: linear motor 1, direct acting cylinder 2, stroke control valve block 3, stepper motor 6, throttling control valve block 7, Acquisition Processor 8, controller 9, pressure sensor 10, cushion dashpot 11, cushion dashpot cylinder cap 13, velocity sensor 14, displacement pass Sensor 16；
One end of direct acting cylinder 2 is connect with linear motor 1, and the other end is connect with stroke control valve block 3, stroke control valve block 3 It is connect by pipeline with cushion dashpot 11；One end of cushion dashpot 11 is connected with throttling control valve block 7, and the other end is connected with cushion dashpot cylinder Lid 13；Velocity sensor 14 and displacement sensor 16 are connected on cushion dashpot cylinder cap 13；It is connected on throttling control valve block 7 Acquisition Processor 8, controller 9 and pressure sensor 10；The stepping electricity coaxial with cushion dashpot 11 is connected on throttling control valve block 7 Machine 6；The output end of controller 9 is connected with the input terminal of each proportional control valve, stepper motor and linear motor 1 respectively；Pressure The output end of force snesor 9, velocity sensor 13 and displacement sensor 15 is connected with the input terminal of Acquisition Processor 8, control Input signal of the device 9 processed according to Acquisition Processor 8 implements control to each valve or motor respectively；
The controller is singlechip controller；Either PLC controller.
The cushion dashpot includes: support rod 12, buffering cylinder piston rod 15, cushion dashpot rod chamber pipeline 17, fuel tank 18, fills Liquid valve 19, oil returning tube 21, cushion dashpot outer shell 23, reset spring 24, cushion dashpot inner casing 25, delays cushion dashpot rodless cavity pipeline 20 Rush the cylinder piston 26 and cushion dashpot return piston 32；
It is cased with cushion dashpot inner casing 25 in cushion dashpot outer shell 23, has reset between cushion dashpot outer shell 23 and cushion dashpot inner casing 25 Spring 24 and cushion dashpot return piston 32；There is cushion dashpot cylinder cap 13 in one end of cushion dashpot outer shell 23 and cushion dashpot inner casing 25, support Cushion dashpot outer shell 23 and cushion dashpot inner casing 25 are connected on throttling control valve block 7 by bar 12 by cushion dashpot cylinder cap 13；It is buffering There is buffering the cylinder piston 26 in cylinder inner casing 25, the one end for buffering cylinder piston rod 15 is connect with buffering the cylinder piston 26, buffers cylinder piston rod 15 other end is pierced by cushion dashpot cylinder cap 13；There is fuel tank 18 in the outer side of cushion dashpot outer shell 23, in fuel tank 18 and stroke control valve Oil returning tube 21 is connected between block 3；It is expert between process control valve block 3 and throttling control valve block 7 and is connected with cushion dashpot rodless cavity pipe Road 20；It is expert between process control valve block 3 and cushion dashpot cylinder cap 13 and is connected with cushion dashpot rod chamber pipeline 17 and prefill valve 19.
The throttling control valve block 7 includes: plug 27, throttle orifice 28, shaft coupling 29, screw rod 30 and spool 31；
The center that throttling control valve block 7 connect one end with stepper motor 6 is linked in sequence and has shaft coupling 29, screw rod 30 and spool 31；One end that throttling control valve block 7 is connect with cushion dashpot 11, which is linked in sequence, plug 27 and throttle orifice 28, the throttle orifice one Side is communicated with cushion dashpot rodless cavity, and the other side is communicated with cushion dashpot reseting cavity.
The plug is that valve block is isolated from the outside in the oil circuit that process is externally formed, and oil body is made not leak.
The direct acting cylinder 2 includes: three two-way proportioning valves 4 of rod chamber, three two-way proportioning valves 5 of rodless cavity, direct acting cylinder Cylinder cap 22, direct acting the cylinder piston 33, stroke control valve block oil circuit 34, direct acting cylinder piston rod 35 and venthole 36；
Three two-way proportioning valves 4 of rod cavity and rodless cavity three are connected on the stroke control valve block 3 connecting with direct acting cylinder 2 Two-way proportioning valve 5；There is stroke control valve block oil circuit 34 in process control valve block 3 of being expert at；Direct acting is connected in the other end of direct acting cylinder 2 Cylinder cylinder cap 22, direct acting cylinder cylinder cap 22 is between direct acting cylinder 2 and linear motor 1；Venthole 36 is provided on direct acting cylinder cylinder cap；Straight There is direct acting the cylinder piston 33 in dynamic cylinder 2, is connected with direct acting cylinder piston rod 35 in direct acting the cylinder piston 33, direct acting cylinder piston rod 35 and straight Line motor 1 connects；The oil circuit and fuel tank 18, cushion dashpot rod chamber oil duct 17, cushion dashpot of the stroke control valve block 34 are without bar Chamber oil duct 20 and direct acting cylinder 2 communicate.
Velocity sensor 14 be mounted on the top of cushion dashpot, way to play for time:
(1), the speed of velocity sensor detection alluvium, adjusts cushion stroke and first pressing by stroke control valve block in real time Power；
(2), when impact body touches piston rod head, speed, the pressure of velocity sensor real-time detection impacted object are passed The pressure of sensor real-time detection cushion chamber, the speed signal and pressure signal measured are input to Acquisition Processor, Acquisition Processor Data are converted and calculated, the data after processing pass to controller, and controller output control signal passes through throttling Control the orifice size of valve block control buffer unit.
Specific step is as follows:
Velocity sensor 14 at the top of cushion dashpot detects the speed v of present percussion object2, it is located at buffering in buffer The pressure sensor 10 of chamber detects that cushion dashpot internal pressure is p2, the two is input to Acquisition Processor 8, Acquisition Processor jointly 8 calculate the best orifice size s for completing Current buffer automatically2, current buffer orifice size is s3, Acquisition Processor 8 is automatically Calculate s2-s3Between difference, will it is processed after data pass to controller 9, the output control signal of controller 9.
Work as s2>s3When, i.e., most pre- orifice size needed for completion Current buffer is greater than current orifice size, and controller 9 controls Stepper motor 6, stepper motor 6 drive spool 31 to move linearly by lead screw 30, and throttle orifice 28 is made to reduce the area covered by spool Domain reaches the best pre- orifice size s for completing Current buffer2；
Work as s2<s3When, i.e., best orifice size needed for completion Current buffer is less than current orifice size, and controller 9 controls Stepper motor 6, stepper motor 6 drive spool 31 to move linearly by lead screw 30, the area for covering the increase of throttle orifice 28 by spool Domain reaches the best pre- orifice size s for completing Current buffer2；
Since the mobile rod chamber of buffering the cylinder piston 26 needs oil liquid to supplement, therefore prefill valve 19 is set, when buffering the cylinder piston When bar 15 fast moves, prefill valve 19, which is opened, carries out repairing to cushion dashpot rod chamber.
Embodiment 1: the velocity sensor 14 at the top of cushion dashpot detects the speed v of present percussion object2, it is located at buffering The pressure sensor 9 of cushion chamber detects that cushion dashpot internal pressure is p in device2, the two is input to Acquisition Processor 8 jointly, adopts Set processor 8 calculates the best orifice size s for completing Current buffer automatically2, current buffer orifice size is s3, at acquisition Reason device 8 calculates s automatically2-s3Between difference,
Work as s2>s3When, i.e., most pre- orifice size needed for completion Current buffer is greater than current orifice size, and controller 9 controls Stepper motor 6, stepper motor 6 drive spool 31 to move linearly by lead screw 30, and throttle orifice 28 is made to reduce the area covered by spool Domain reaches the best pre- orifice size s for completing Current buffer2；
Work as s2<s3When, i.e., best orifice size needed for completion Current buffer is less than current orifice size, and controller 9 controls Stepper motor 6, stepper motor 6 drive spool 31 to move linearly by lead screw 30, the area for covering the increase of throttle orifice 28 by spool Domain reaches the best pre- orifice size s for completing Current buffer2；
Since the mobile rod chamber of buffering the cylinder piston 26 needs oil liquid to supplement, therefore prefill valve 19 is set, when buffering the cylinder piston When bar 15 fast moves, prefill valve 19, which is opened, carries out repairing to cushion dashpot rod chamber.
The specific course of work:
One, cushion stroke is adjusted
The speed of 14 real-time detection alluvium of velocity sensor at the top of cushion dashpot, passes to acquisition for speed signal Speed signal is converted and is calculated by processor 8, Acquisition Processor 8, and calculated result is passed to controller by Acquisition Processor 8 8, controller 9 drives linear motor 1, and linear motor 1 directly drives the movement of direct acting the cylinder piston 33, and 2 pressure oil output of direct acting cylinder is led to The flow that three two-way proportioning valves 4 of three two-way proportioning valves 5 of rodless cavity and rod chamber adjust output hydraulic pressure oil is crossed, output is adjusted Cushion dashpot 11 arrives the speed of hydraulic oil, to adjust 11 stroke of cushion dashpot, specific adjustment process is as follows: velocity sensor 14 is examined Measure alluvium speed, speed signal is passed to Acquisition Processor 8 by velocity sensor 14, and Acquisition Processor 8 is by speed signal It is converted and is calculated, calculated result is passed to controller 8 by Acquisition Processor 8, and controller 9 calculates current completion buffering institute The cushion stroke x needed, the displacement sensor 15 at the top of cushion dashpot detect current buffer stroke x1, Acquisition Processor 8 It is automatic to calculate x-x1Between difference.
If x > x1, that is, the stroke of Current buffer is completed greater than current buffer stroke, needs to increase the buffering row of cushion dashpot 11 Pressure oil is accessed 11 rodless cavity of cushion dashpot by journey, three two-way proportioning valves 5 of rodless cavity, and three two-way proportioning valves 4 of rod chamber will delay The rod chamber access fuel tank 18 of cylinder 11 is rushed, therefore pressure oil is pushed outwardly cylinder piston rod 15 is buffered, until displacement sensor 16 Detection reaches the stroke s that can complete Current buffer, and at this moment controller 8 will issue signal, make three two-way ratios of rodless cavity Three two-way proportioning valves 4 of valve 5 and rod chamber return to middle position, and stroke adjustment effect is completed in 1 stop motion of linear motor；
If s < s1, that is, the stroke of Current buffer is completed less than current buffer stroke, needs to reduce the buffering row of cushion dashpot 11 Pressure oil is accessed fuel tank 18 by journey, three two-way proportioning valves 5 of rodless cavity, and three two-way proportioning valves 4 of rod chamber are by cushion dashpot 11 Rod chamber accesses 11 rodless cavity of cushion dashpot, therefore pressure oil retracts inwards by cylinder piston rod 15 is buffered, until displacement sensor is examined It measures and reaches the stroke s that can complete Current buffer, at this moment controller will issue signal, make three two-way proportioning valves 5 of rodless cavity Middle position is returned to three two-way proportioning valves 4 of rod chamber, stroke adjustment effect is completed in linear motor stop motion；All control valves Median Function be O-shaped.
Two, initial pressure is set
The speed of 14 real-time detection alluvium of velocity sensor at the top of cushion dashpot, passes to acquisition for speed signal Speed signal is converted and is calculated by processor 8, Acquisition Processor 8, and calculated result is passed to controller by Acquisition Processor 8 8, controller 9 is calculated according to the speed of present percussion object complete Current buffer needed for best initial pressure p, the pressure inside cushion dashpot Force snesor 10 detects that Current buffer cylinder interior pressure value is p1, Acquisition Processor 8 calculates p-p automatically1Between difference.
Work as p > p1When, i.e., the best initial pressure p that completion Current buffer needs is greater than 11 internal pressure p of Current buffer cylinder1, need 11 internal pressure of cushion dashpot is improved, so that the most effective completion Current buffer of ability, controller 9 control linear motor 1, straight line Motor 1 directly drives the movement of direct acting the cylinder piston 33,2 pressure oil output of direct acting cylinder, three 5 cut-in pressures of two-way proportioning valve of rodless cavity Oil, three two-way proportioning valves 4 of rod chamber are in middle position state, and the pressure oil of cushion dashpot rodless cavity compresses reset spring 32, directly It monitors that 11 internal pressure of cushion dashpot is made to reach best needed for completing Current buffer to 11 internal pressure sensor 10 of cushion dashpot Initial pressure p, controller 9, which issues signal, makes linear motor 1 and all control valves return to middle position；
Work as p > p1When, i.e., the best initial pressure p that completion Current buffer needs is less than 11 internal pressure p of Current buffer cylinder1, need 11 internal pressure of cushion dashpot is reduced, so that the most effective completion Current buffer of ability, controller 9 control linear motor 1, straight line Motor 1 directly drives the movement of direct acting the cylinder piston 33, and direct acting cylinder 2 accesses directly from cushion dashpot oil suction, three two-way proportioning valves 5 of rodless cavity Dynamic cylinder, three two-way proportioning valves 4 of rod chamber are in middle position state, and the pressure oil of cushion dashpot rodless cavity is released reset spring 32 It puts, until 11 internal pressure sensor 10 of cushion dashpot monitors to reach 11 internal pressure of cushion dashpot needed for completing Current buffer Best initial pressure p, controller, which issues signal, makes linear motor 1 and all control valves return to middle position；
Three, orifice size is adjusted
(1) alluvium not in contact with to buffering cylinder piston rod
The speed of 14 real-time detection alluvium of velocity sensor at the top of cushion dashpot, passes to acquisition for speed signal Speed signal is converted and is calculated by processor 8, Acquisition Processor 8, and calculated result is passed to controller by Acquisition Processor 8 8, Acquisition Processor 8 calculates best pre- orifice size s, the orifice size of current buffer required for completing Current buffer and is s1, Acquisition Processor 8 calculates s-s automatically1Between difference, controller 9 controls stepper motor 6, and stepper motor 6 passes through lead screw 30 driving spools 31 move linearly, and so that 28 area of throttle orifice is reached the best pre- orifice size s for completing Current buffer, avoid moment Regulated quantity is excessive when impact.
Work as s > s1When, i.e., best pre- orifice size needed for completion Current buffer is greater than current orifice size, and controller 9 is controlled Stepper motor 6 processed, stepper motor 6 drive spool 31 to move linearly by lead screw 30, cover the reduction of throttle orifice 28 by spool Region reaches the best pre- orifice size s for completing Current buffer；
As s < s1When, i.e., best pre- orifice size needed for completion Current buffer is less than current orifice size, and controller 9 is controlled Stepper motor 6 processed, stepper motor 6 drive spool 31 to move linearly by lead screw 30, cover the increase of throttle orifice 28 by spool Region reaches the best pre- orifice size s for completing Current buffer；
(2) alluvium touches buffering cylinder piston rod
When alluvium touches buffering cylinder piston rod 15, the pressure that the speed and buffering of alluvium are intracavitary can all be sent out constantly Changing, and the key factor for influencing to buffer efficiency is the speed of alluvium and buffers intracavitary pressure, is impacted by detection The pressure that the speed and buffering of object are intracavitary can make the buffering efficiency of buffer reach highest to control throttleng surface.

Claims (6)

1. a kind of intelligent feedback variable throttling buffer system, it is characterized in that: buffer system includes: linear motor, direct acting cylinder, stroke Control valve block, stepper motor, throttling control valve block, Acquisition Processor, controller, pressure sensor, cushion dashpot, cushion dashpot cylinder Lid, velocity sensor, displacement sensor；Buffering in a wide range of is realized by the closed-loop control of velocity sensor and pressure sensor The adjust automatically of capacity；
One end of the direct acting cylinder is connect with linear motor, and the other end is connect with stroke control valve block, and stroke control valve block passes through Pipeline is connect with cushion dashpot；One end of cushion dashpot is connected with throttling control valve block, and the other end is connected with cushion dashpot cylinder cap；Described Velocity sensor and displacement sensor are connected on cushion dashpot cylinder cap；Acquisition process is connected on the throttling control valve block Device, controller and pressure sensor；The stepper motor coaxial with cushion dashpot is connected on throttling control valve block；The controller Output end is connected with the input terminal of each proportional control valve, stepper motor and linear motor respectively；The pressure sensor, speed The output end of degree sensor and displacement sensor is connected with the input terminal of Acquisition Processor, and controller is according to Acquisition Processor Input signal, control is implemented to each valve or motor respectively；The controller is singlechip controller；Either PLC control Device processed.
2. a kind of intelligent feedback variable throttling buffer system according to claim 1, it is characterized in that: the cushion dashpot packet It includes: support rod, buffering cylinder piston rod, cushion dashpot rod chamber pipeline, fuel tank, prefill valve, cushion dashpot rodless cavity pipeline, oil return pipe Road, cushion dashpot outer shell, reset spring, cushion dashpot inner casing, buffering the cylinder piston ease up and rush cylinder return piston；
The outer inner cylinder sleeve of the cushion dashpot has cushion dashpot inner casing, has reset spring gentle between cushion dashpot outer shell and cushion dashpot inner casing Rush cylinder return piston；There is cushion dashpot cylinder cap in one end of cushion dashpot outer shell and cushion dashpot inner casing, and support rod will by cushion dashpot cylinder cap Cushion dashpot outer shell and cushion dashpot inner casing are connected on throttling control valve block；There are buffering the cylinder piston, cushion dashpot in cushion dashpot inner casing One end of piston rod is connect with buffering the cylinder piston, and the other end for buffering cylinder piston rod is pierced by cushion dashpot cylinder cap；In cushion dashpot outer shell There is fuel tank in outer side, connects oil returning tube between fuel tank and stroke control valve block；It is expert at process control valve block and throttling control valve Cushion dashpot rodless cavity pipeline is connected between block；It is expert between process control valve block and cushion dashpot cylinder cap and is connected with cushion dashpot rod chamber Pipeline and prefill valve.
3. a kind of intelligent feedback variable throttling buffer system according to claim 1, it is characterized in that: the throttling controls Valve block includes: plug, throttle orifice, shaft coupling, screw rod and spool；
The center that the throttling control valve block connect one end with stepper motor is linked in sequence and has shaft coupling, screw rod and spool；Throttling One end that control valve block is connect with cushion dashpot is linked in sequence and has plug and throttle orifice, and the throttle orifice side and cushion dashpot are without bar Chamber communicates, and the other side is communicated with cushion dashpot reseting cavity.
4. a kind of intelligent feedback variable throttling buffer system according to claim 1, it is characterized in that: the direct acting cylinder packet It includes: three two-way proportioning valves of rod chamber, three two-way proportioning valves of rodless cavity, direct acting cylinder cylinder cap, direct acting the cylinder piston, stroke control valve Block oil circuit, direct acting cylinder piston rod and venthole；
Three two-way ratios of three two-way proportioning valves of rod cavity and rodless cavity are connected on the stroke control valve block connecting with direct acting cylinder Example valve；There is stroke control valve block oil circuit in process control valve block of being expert at；Direct acting cylinder cylinder cap, direct acting are connected in the other end of direct acting cylinder Cylinder cylinder cap is between direct acting cylinder and linear motor；Venthole is provided on direct acting cylinder cylinder cap；There is direct acting the cylinder piston in direct acting cylinder, Direct acting cylinder piston rod is connected in direct acting the cylinder piston, direct acting cylinder piston rod is connect with linear motor；The stroke control valve The oil circuit of block is communicated with fuel tank, cushion dashpot rod chamber oil duct, cushion dashpot rodless cavity oil duct and direct acting cylinder.
5. a kind of intelligent feedback variable throttling way to play for time, it is characterized in that: velocity sensor is mounted on the top of cushion dashpot, buffering Method includes:
(1) speed of velocity sensor detection alluvium, adjusts cushion stroke and initial pressure by stroke control valve block in real time；
(2) when impact body touches piston rod head, the speed of velocity sensor real-time detection impacted object, pressure sensor are real When detect the pressure of cushion chamber, the speed signal and pressure signal measured is input to Acquisition Processor, and Acquisition Processor is by data It is converted and is calculated, the data after processing pass to controller, and controller output control signal passes through throttling control valve The orifice size of block control buffer unit.
6. a kind of intelligent feedback variable throttling way to play for time according to claim 5, it is characterized in that: velocity sensor detects To the speed v of present percussion object2, the pressure sensor of cushion chamber detects that cushion dashpot internal pressure is p in buffer2, two Person is input to Acquisition Processor jointly, and Acquisition Processor calculates the best orifice size s for completing Current buffer automatically2, currently Buffer orifice size is s3, Acquisition Processor calculates s automatically2-s3Between difference, will it is processed after data pass to Controller, controller output control signal；
Work as s2>s3When, i.e., most pre- orifice size needed for completion Current buffer is greater than current orifice size, and controller controls stepping Motor, stepper motor drive spool to move linearly by lead screw, so that throttle orifice reduction is reached completion by the region that spool covers and work as The best pre- orifice size s of preceding buffering2；
Work as s2<s3When, i.e., best orifice size needed for completion Current buffer is less than current orifice size, and controller controls stepping Motor, stepper motor drive spool to move linearly by lead screw, so that throttle orifice increase is reached completion by the region that spool covers and work as The best pre- orifice size s of preceding buffering2；
It is mobile to buffer the cylinder piston, rod chamber needs oil liquid to supplement, therefore prefill valve is arranged, when buffering cylinder piston rod fast moves, Prefill valve, which is opened, carries out repairing to cushion dashpot rod chamber.
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